Work-holder.



M. GUETT.

WORK HOLDER.

APPLICATION man JUNE 25, 1914.

Patented Dec. 14, 1915.

2 SHEETS-SHEET I COLUMBIA PLANOGRAPH ISO-.WASHINGTON. n c.

M. Gum.

WORK HOLDER.

APPLICATION FILED JUNE 25. I914.

Patented Dec. 14, 1915.

mmms.

2 SHEETSSHEET 2.

-INVENTOR. Monme Gueti: BY my? WITNESSES:

HIS ATTORNEY.

an snares ra'rnn CFFFCE.

MONROE GUETT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE HART & HEGEMAN MANUFACTURING- COIVIPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

WORK-HOLDER.

Specification of Letters Patent.

Patented Dec. 1141, 1915..

Application filed. June 25, 1914. Serial No. 847,238.

T all whom it may concern Be it known that I, MONROE GUETT, a citizen of the United States, and resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in VVork- Holders.

T he object of this invention is to provide a work holder which shall be mechanically operated and actuated to properly present work to the operating member, such as a grinding wheel, butling or polishing wheel, although the invention in its broader aspect may be applicable for holding and presenting work to operating or work-performing devices of another character.

The embodiment of the invention selected for illustration is concerned with a mechanism adapted for presenting work to a grinding or polishing wheel, and Figure 1 is a front view of the mechanism. Fig. 2 a side view thereof. Fig. 3 a top view partly in section.

Fig. '5 a sectional view on the line 55 of Fig.4.

This work holder as illustrated comprises a rectangular frame A made up of side members a, a lower transverse member I) and an upper transverse member a. This frame is pivotally supported at its lower end as indicated at cl, occupies an inclined'pos'ition as clearly seen in Fig. 2, and is adjustably supported bythe rod 6 equipped with adjusting and locking devices 0 e Mounted on the upper frame member 0, is a bearing 2 in which is mounted a shaft 3 carrying at its inner end a worm 4, and has loosely mounted on its outer end a driving pulley 5 which may be connected With any suitable source of power and connected to the shaft 3 by the clutch 6 having an actuating handle 7 and a trip lever 8. The upper ends of the side members a, a of the frame project beyond the upper transverse frame member 0 and support a shaft 10 upon which is rotarily mounted a gear 11 which meshes with the worm 1. There is also mounted on this shaft a secondary frame 15 which reciprocates longitudinally thereon, being moved by a sleeve 16 on the gear 11 which engages a roller 17 at the end of an arm 18 which is fast to this secondary frame. A spring 19 connected with this secondary frame tends to hold the roller 17 against the end ofthe sleeve 16 which is fluted, and consequently as Fig. 4 a detail plan-view 'of the work support.

against the surface of the cam 31.

the gear 11' and its sleeve 16 rotate, driven by the worm 4, the secondary frame is caused to reciprocate longitudinally on the shaft 10.

The work-holding arm 20 is mounted in the following manner: A rectangular block 21 is rotarily mounted on the ends of the secondary frame, and the arm 20 has an apertured end 22 which fits and slides upon this block so that the arm as a whole has a movement transversely of the shaft 10 as well as rotarily with respect thereto. At the end of the arm 20 is the work receiver 25 offset laterally therefrom and having a suitably shaped shce 26 secured to its rear wall, which bears against a stationary presser foot 27, the contacting portion of which is preferably a ball, as indicated at 28. The arm 20 also carries a roller 30 which cooperates with a cam 31 mounted on a shaft 32, which shaft is carried in the bearing 33 mounted on the secondary frame 15, and carries at its opposite end a wide gear 3-1 which meshes with the gear 11. i

X indicates the work-producing wheel, such as a grinding, or buffing wheel mounted on a shaft Y, the driving mechanism of which is not shown but may be of any construction and arrangement desired.

The operation of the mechanism is as follows, assuming of course that the polishing or grinding wheel X is being driven: The work-holding arm 20 is raised from the position shown in Fig. 2, and a piece of work placed on the work receiver 25. The arm 20 is then lowered until the roller 30 rests upon the cam 31. By the handle 7 the clutch 6 is then thrown in, connecting the driving pulley 5 with the shaft 3, carrying the worm 4 which meshes with the gear 11, which in turn drivesthe gear 31 and the shaft 32 carrying the .cam 31. The wheel X rotating in the direction of the arrow tends to draw the arm 20 downwardly, holding the roller 30 The work-holding arm is shifted transversely of the shaft 10 bythe engagement of the curved rear surface 26 of the work receiver 25 with the presser-foot 27, and the work receiver is quite rapidly shifted transversely of the wheel X by the engagement of the fluted end of the sleeve 16 with the roller 17 on the arm 18 connected to the secondary frame. The cam 31 allows the arm to drop until the entire surface of the work has been sub jected to the action of'the wheel, and then raises the wheel until the work is disengaged from the wheel, andrall the time the Work is en gaged with the wheel it may be shifting- 8 and throws out the clutch 6, bringing all parts to rest except of course the wheel X. The piece ofwork is removed and another: piece, placed on the ork receiver and,' the same operation, repeated, The frame canbe adjusted to proper position so as to. bring. the work receiver into proper relation with the. wheel; by operating, the adjuster e on the rod e, and then-locking. it in position by the lock 6?.

In. order to, accommodate inequalities in theiwork and in the surface of the wheel X, itisadvisable to make the Work receiver in two. parts, comprising a back platetO; with channelsdl in which ribs. 42' on the front plate 43; fit, springs Mglocked' in recesses. in the backplate 40 bearing against thefront plated?) to forceit out against the'wheel. The work is directly supported. by. the front. plate 43, and. these springs 4 lare. stiff. enough to. provide a proper pressureof the work against the wheel, but will yield. un-

der the inequalitiesofthe.face of the wheel so-as, to produce an evenand uniform finish on the work.

The particular machine. hereiillustrated is designedyfor the polishing, and'fi-nishing of face platesused; in connection with, electric switches, but the work receiver can be shaped: to, receive any, shapeof an-v article, and the shoegiven; such. a. contour aswill always hold; the work against the wheel, and the mechanical operation of: the. various parts. insures anevenness and uniformity of "finish which it is very diilicult, if; not im- 7 a. main frame, a. shaft mounted insaid frame. and supported ini-bearingsiin; the side members thereof, a. work IGCQlYQIT: pivotally mounted upon' said: shaft and: slidingly: sup? ported for: longitudin-ah movement trans: vensely. thereof; and separate means for-imparting pivotal: and slidingmotion to said receiazer, J

2; In a machin'ei'ofithe character described,

a main f=rame '..pivotally' supported" at: its

\Vhen the shafts 10'and" lower end, an adjustable support for the upper end of said frame, a work receiver piv otallymounted at the upperend of said frame, supported for reciprocating motion in said fame in a plurality of directions.

3; In a machine of the character described, a main frame pivotally supported at its lower end, an adjustable support for the upper end; of said; frame, a work receiver pivotally mounted at the upper end of said frame, supported for simultaneous reciprocating motion in, said frame in a. plurality of directions,

t. Ina machine of, the character described, an. adjustably mounted, main. frame, a work holder pivotally; mounted; in said, frame and supported for reciprocating motion in a; plurality of directions relative to said main frame, combined with separate means for producing. the specified reciprocating motions, and with. additional meansfor producingiin part. the pivotal, motion.

' 5. In a machine of the character described, a main framepivotally mounted at itsloiver end, an adjustable support fortheuppcr end thereof, a shaft mounted in the upper end of. said main frame and supported in bearings in the side members thereof, a gear rotatable on said. shaft and, driving means therefor, a bearing slidingly mounted, on said shaft, a Work-holding arm pivotally mounted on said shaft, means for moving said bearing: and arm, longitudinally ofsaid shaft, and meansfor moving-said arm, relative to said bearing transversely of said shaft.

6; In a device of the character, described, a main frame, an adjustable support for said frame, awork receiver pivotally mounted on said; frame, means for moving-said work receiver longitudinally, means for moving said work receiver laterally from side to side of said frame, and meansfor moving said work receiver pivotally.

7. In a device ofthe character'dcscribed, aframe, avshaft supportcdtherein, a second ary frame mounted: for reciprocatory movement along said shaft, a, work; receiver pivotallymounted on said; secondary frame, means for impartinga reciprocatory. motion to said: secondary frame and itsattached Workreceiver relative to. said main. frame, and. means for moving, said; workreceiver relative toisaidmain andsecondary frames both. transversely and rotarily; of: said: shaft.

8. In a-.dev,ice of the character described, a frame, an, upper frame memberhaving front and rear extensions, a shaft mounted on the rear extension. of;- said uppen frame member, .a driving pulley and: a, worm mounted on said shaft, a second shaft supported, at the upper. endsfiofthe side. membersof-said f-rame,-a gear mounted on said shaft and meshing. with, said worm, a? secondaryframe mounted on said shaft, a I

cam carried by said gear, a roller carried by said secondary frame and actuated by said cam to move said frame longitudinally of said shaft in one direction, means to move said secondary frame longitudinally of said shaft in the opposite direction, a Work holding arm carried by said secondary frame and rotarilv and longitudinally movable with respect thereto, a bearing carried by said secondary frame, a shaft mounted in said bearing, a gear on said shaft meshing with the first mentioned gear, and a cam at the opposite end of said shaft cooperating with said Work holding arm.

9. In a device of the character described, a frame, an upper frame member having front and rear extensions, a shaft mounted on the rear extension of said upper frame member, a driving pulley and a' Worm mounted on said shaft, a second shaft supported at the upper ends of the side members of said frame, a gear mounted on said shaft and meshing With said Worm, a secondary frame mounted on said shaft, a sleeve carried by said gear, a roller carried by said secondary frame and actuated by said sleeve to move said frame longitudinally of said shaft in one direction, a spring to move said secondary frame longitudinally of said shaft in the opposite direction, a Work-holding arm carried by said secondary frame and rotarily and longitudinally movable With respect thereto, a bearing carried by said secondary frame, a shaft mounted in said bearing, a gear on said shaft meshing with the first mentioned gear, a cam at the opposite end of said shaft cooperating with said Work-holding arm, and a presser-foot carried by the front extension of said main frame and adapted for cooperation yvith said Work-holding arm to move it longitudinally.

10. In a machine of the character described, the combination With a frame and a work-holding arm swingingly mounted thereon and adapted for longitudinal motion transversely thereof, of a presser foot carried by said frame, and a shoe on said Work-holding arm adapted for cooperation With said presser foot as said arm swings to produce the longitudinal motion thereof.

11. In a machine of the character described, a main frame, a secondary frame, means for moving said secondary frame laterally from side to side of said main frame,

and a Work-holding arm carried by and movable With said secondary frame and adapted for movement relatively to said main frame in a plurality of directions.

12. In a machine of the character described, a Work receiver comprising a back plate, and a front plate yieldingly supported on said back plate.

MONROE GUETT.

Witnesses:

M. Burn, A. J. BENNETT.

Copies of this'patezit may be obtained for five cents each, by addressing the Commissioner of Patents. Washington. D. C. 

